The news was reported by the Telegram channel "The Pope's Pearls" : it seemed to be fake, given that no news could be found on the web, but the event has just been confirmed by the Reverend Father Justo Lofeudo, a priest who is certainly a Bergoglian.
There's still something about these pictures that look fake to me.
Is there a link to this Novus Ordo priest's comments? The Sanctuary's website doesn't seem to be updated since 2020, and I can't seem to find such a priest in Argentina.
I did some research, and I have found the priest's website:
https://padrelofeudo.perlascristianas.com/2020/06/padre-justo-lofeudo-bienvenida.htmlHe is an Argentine who has lived in Spain for over twenty years. He is some sort of conservative, apparently.
I did not find anything related to this event, but it does not seem completely absurd that he might be aware of events occuring in Buenos Aires.